Tweco A80-A120 CutMaster - Manual (Page 29)

CUTMASTER A80, A120
Manual 0-5119 OPERATION
4-1
SECTION 4 SYSTEM:
OPERATION
4.01 Front Panel Controls / Features
See Illustration for numbering Identification
1. Output Current Control
Sets the desired output current. Output settings
up to 60 Amps may be used for drag cutting, when
hand torch is used and the torch tip contacting
the workpiece or higher for standoff cutting. For
automation current control settings greater than
45 Amps will stop the arc and remove the “OK to
Move” signal when the tip contacts the plate. For
currents below 45 Amps the cutting will continue
even when the tip is in contact with the work.
2. Function Control
Function Control Knob, Used to select between
the different operating modes.
SET Used to purge the air through the unit
and torch and leads and to adjust gas pressure.
RUN Used for general cutting operations
RAPID AUTO RESTART Allows for faster re-
starting of the Pilot Arc for uninterrupted cutting.
LATCH Used for longer hand held or
mechanical cuts. This feature is disabled while
the automation torch is used, and is enabled when
a hand torch is connected. Once a cutting arc is
established, the torch switch can be released. The
cutting arc will remain ON until the torch is lifted
away from the work piece, the torch leaves the
edge of the work piece the torch switch is activated
again or if one of the system interlocks is activated.
3. ON OFF Power Switch
ON / OFF Switch controls input power to
the power supply. Up is ON, down is OFF.
4. Air/Gas Pressure Control
The Pressure
+
Control is used in the
"SET" mode to adjust the air/gas pressure. Pull
the knob out to adjust and push in to lock.
5. AC Indicator
Steady light indicates power supply is ready for
operation. Blinking light indicates unit is in pro-
tective interlock mode. Shut unit OFF, shut OFF
or disconnect input power, correct the fault, and
restart the unit. Refer to Section 5 for details.
A
+
PSI BAR
MAX MAX
MIN MIN
!
1 2 3 4
5 6 7 8 9
Art# A-07886
MIN MAX
10
6. Temp Indicator
Indicator is normally OFF. Indicator is ON when
internal temperature exceeds normal limits. Let
the unit cool before continuing operation.
7. Gas Indicator
Indicator is ON when minimum input gas pressure
for power supply operation is present. Minimum
pressure for power supply operation is not suf-
ficient for torch operation.
8. DC Indicator
Indicator is ON when DC output circuit is active.
9.
!
Fault Error Indicator
Indicator is ON when Fault circuit is active. See
section 5 for explanations of fault lights.
10. Pressure Indicators
PSI BAR
MAX MAX
MIN MIN
80
75
70
65 5.5
85 5.9
90 6.3
5.2
4.8
4.5
Art # A-08170
The Indicators will illuminate according to the
pressure set by the Pressure Control Knob (num-
ber 4).